Terahertz generation and optical characteristics of P-BI.
Opt Lett
; 44(17): 4279-4282, 2019 Sep 01.
Article
en En
| MEDLINE
| ID: mdl-31465382
We present the structural and THz generation characteristics of the molecular salt crystal (E)-2-(4-(dimethylamino)styryl)-1,1,3-trimethyl-1H-benzo[e]indol-3-ium iodide (P-BI) using optical rectification with IR pump wavelengths. P-BI shows a peak-to-peak field â¼6 times greater than inorganic crystal GaP, and a broader THz spectrum. Data were obtained from 0-6 THz showing a significant dip in generation at 1.8 THz, similar to what has been observed with the THz generation crystal DAST at 1 THz. We characterized the power dependence of P-BI at different IR wavelengths, with optimal THz generation at the 1550-nm pump wavelength. To model THz generation as a function of P-BI crystal thickness, we measured the THz complex refractive index and the IR group index; modeling shows that imperfect phase matching leads to spectral narrowing centered at â¼2.5 THz as the crystal thickness is increased. P-BI could provide a useful alternative to inorganic THz generation crystals such a GaP.
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1
Colección:
01-internacional
Base de datos:
MEDLINE
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Opt Lett
Año:
2019
Tipo del documento:
Article
Pais de publicación:
Estados Unidos